65395756681 has 2 divisors, whose sum is σ = 65395756682. Its totient is φ = 65395756680.

The previous prime is 65395756669. The next prime is 65395756747. The reversal of 65395756681 is 18665759356.

65395756681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59187104656 + 6208652025 = 243284^2 + 78795^2 .

It is a cyclic number.

It is not a de Polignac number, because 65395756681 - 2⁵ = 65395756649 is a prime.

It is a super-2 number, since 2×65395756681² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (65395756661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32697878340 + 32697878341.

It is an arithmetic number, because the mean of its divisors is an integer number (32697878341).

Almost surely, 2^65395756681 is an apocalyptic number.

It is an amenable number.

65395756681 is a deficient number, since it is larger than the sum of its proper divisors (1).

65395756681 is an equidigital number, since it uses as much as digits as its factorization.

65395756681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824000, while the sum is 61.

The spelling of 65395756681 in words is "sixty-five billion, three hundred ninety-five million, seven hundred fifty-six thousand, six hundred eighty-one".